Constraining the ellipticity and frequency of binary neutron star remnant via its gravitational-wave and electromagnetic radiations
arXiv:2305.01364 · doi:10.1093/mnras/stad1266
Abstract
The nature of the merger remnant of binary neutron star (BNS) remains an open question. From the theoretical point of view, one possible outcome is a supra-massive neutron star (SMNS), which is supported by rigid rotation and through its survival of hundreds of seconds before collapsing into a black hole (BH). If this is the case, the SMNS can emit continuous gravitational waves (GW) and electromagnetic (EM) radiation, particularly in the X-ray band. In this work, the ellipticity and initial frequency of SMNS are constrained with a Bayesian framework using simulated X-ray and GW signals, which could be detected by The Transient High Energy Sky and Early Universe Surveyor (THESEUS) and Einstein Telescope (ET), respectively. We found that only considering the X-ray emission can not completely constrain the initial frequency and ellipticity of the SMNS, but it can reduce the ranges of the parameters. Afterwards, we can use the posterior distribution of the X-ray parameter estimates as a prior for the GW parameter estimates. It was found that the 95 credible region of the joint X-ray-GW analysis was about times smaller than that of the X-ray analysis alone.
Accepted by MNRAS
References in corpus (32)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
- Constraining neutron star tidal Love numbers with gravitational wave detectors
- Exploring the Sensitivity of Next Generation Gravitational Wave Detectors
- Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
- INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
- Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
- Gravitational-wave sensitivity curves
- Producing ultra-strong magnetic fields in neutron star mergers
- Accurate evolutions of inspiralling neutron-star binaries: prompt and delayed collapse to black hole
- Merger of binary neutron stars to a black hole: Disk mass, short gamma-ray bursts, and quasinormal mode ringing
- X-Ray Flares from Postmerger Millisecond Pulsars
- Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
- Modelling magnetically deformed neutron stars
- The Millisecond Magnetar Central Engine in short GRBs
- The X-ray afterglow flat segment in short GRB 051221A: Energy injection from a millisecond magnetar?
- GRB afterglow plateaus and Gravitational Waves: multi-messenger signature of a millisecond magnetar?
- Maximum gravitational-wave energy emissible in magnetar flares
- Improved constraints on H0 from a combined analysis of gravitational-wave and electromagnetic emission from GW170817
- Magnetically Torqued Neutrino-Dominated Accretion Flows for Gamma-ray Bursts
- The braking index of millisecond magnetars
- Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
- All-sky Search for Continuous Gravitational Waves from Isolated Neutron Stars in the Early O3 LIGO Data
- Parameter-space metric of semicoherent searches for continuous gravitational waves
- Magnetar central engine and possible gravitational wave emission of nearby short GRB 160821B
- A Bayesian approach to multi-messenger astronomy: Identification of gravitational-wave host galaxies
- Prospects of observing continuous gravitational waves from known pulsars
- Constraining the Braking Index and Energy Partition of Magnetar spindown with {\em Swift}/XRT data
- Probing intrinsic properties of short gamma-ray bursts with gravitational waves
- Evidence for gravitational-wave dominated emission in the central engine of short GRB 200219A
- Advancing the Landscape of Multimessenger Science in the Next Decade
- Gravitational-wave evolution of newborn magnetars with different deformed structure